Spring compressor



May s, 192s. 1,536,380 R. D. DOUGLASS Y SPRING COMPRESS 0R Patented May5, 1925.S

A'fi-UNITED STATES ROY D. DOUGLASS, OIF IVIINNEAPOLIS,` MINNESOTA.

SPRING COMPRESSOR.

Application filed February 20, 1924. Serial No. 694,022.

lTo all whom 'it may concern.'

i citizen of the United States, residingat Minneapolis, in the county ofHennepin and State of Minnesota, have invented certain new and usefulImprovements in Spring Compressors; and I do hereby declare thefollowing to be a full, clear, and eXact description of the invention,such as will enable. others skilled in the art to which it appertains tomake and use the same.

My invention provides an extremely simple and highly eiiicient springcompressor for use in removing springs from the rods of puppet valvesused in internal combustion engines. Generally stated, the inventionconsists of the novel devices and combinations of devices hereinafterdescribed and defined in the claims.

In the accompanying drawings, which illustrate the invention, likecharacters indi` cate like parts throughout the several views.

Referring to the drawings:

Fig. l is a side elevation showing the improved spring compressor; j

Fig. 2 is a horizontal section on the line Q-2 of Fig. 1;

Fig. 3 is a front elevation of the spring compressor, some parts beingbroken away;

Fig. 4 is a section on the line 1H-4 of Fig. 2;

Fig. 5 is a perspective showing one of the spring-engaging prongs of theyoke; and

Fig. 6 is a perspective showing a device adapted to receive and hold theremoved spring in compressed condition.

The main element o-f the spring compressor is in the form of athree-sided yoke 7 made up of a pair of metallic straps con nected byrivets 8 and having at the lower portion of the yoke diverging prongsadapt ed to be sprung apart and equipped with spring-engagir'igv flanges9 and spring'guiding plates' 10. Ihese spring' prongs are' adapted to beadjusted to the'diameter of diiferent springs within certain limit ofvari# ation. Rigidly secured to the upper portion of. the yoke 7 is ahead block .11, provided with a spring-engaging arm 12. A springslcompressina rod 13 works vertically through the head bltock 11 .51nd,just below said head block, is provided with a collar 14 that is"adjustably secured thereto by a set screw 15. The upper ends of thestraps that form the yoke 7 are projected upward at 7 and a levery 16 ispivoted thereto at 17. The lever 16 is connected by links 18 to thecollar 14. The upper end of the rod 13 is turned out` ward and downwardto a point where it overlies a spring-centering lug 12 on the arm 12 andthis downturned end of said rod is provided with a diametricallyprojecting spring-engaging pin 19.

The rod 13 can be adjusted through the collar 14 for different lengthsof spring to be compressed. By oscillatory movements of the lever 16,the collar 14 and, hence, the rod 13, may be moved vertically, and bythis action, the coiled spring can be compressed between the arm 12 andthe pin 19. Then the spring is completely compressed, the lever 16 andlinks 18 will be turned slightly inward of a dead center. therebyforming a self-locking device. Then the spring is compressed, .it isadapted to be engaged by the flanges 2O of retaining plates 21 securedto the ends of a U-shaped metal strap 22.

In compressing a spring that is applied around a valve stem, the lowerend of the rod 13 can be rested on any suitable support, such as thecylinder casting, and the flanges 9, being then engaged under the springand the lever 16 being then moved downward, such spring will becompressed, so that it may be engaged and held by the device shown inFig. 6.

That I claim is:

A. spring compressor comprising a three= sided yoke formed at its lowerportion with spring 'prongs provided with spring-engaging flanges, theupper portion of said yoke' being extended upward, a lever pivoted to'the upper extensions4 of said yoke, aguide block rigidly secured to theupper`portion of saidyoke, a rod slidable through said guide block, aspring-engaging arm project#l ing from said guide block, said rod havingan offset end overlying said arm and coop! erating therewith to compressaspring a collar adjustably secured to said rod, and a link connectionbetween said collar and said lever. p j

In testimony whereof I affix my isignature.

ROY D.l DOUGLASS loo

